The premier of Canada’s oil-rich province of Alberta says she would not support any move to stop energy shipments to the United States as a way to combat U.S.

Canadian oil and gas stocks fell the most this year, even as US producers rallied, after Alberta’s premier warned that the incoming Trump administration is likely to put tariffs on oil and gas imports.

Canadian Foreign Affairs Minister Melanie Joly said she hasn’t ruled out an energy embargo in response to Trump’s tariff threat.

After weekend meetings with U.S. president-elect Donald Trump, Alberta Premier Danielle Smith urged the federal and other provincial governments to prepare for tariffs, but advised against using Canadian energy as a bargaining threat.